L
luuhuuhai


to co bai nay can hoi
BAI:1
tim so nguyen to P biet P^2+44 la so nguyen to
BAI:2
Xet cac so co 7 chu so khac nhau va cac chu so tren thuoc tap hop{1,2,3,4,5,6,7}
a/trong cac so nhan duoc co so nao bang tong 2 so con lai hay khong?
b/co ton tai 2 so ma so nay la uoc cua so kia hay khong?Tai sao?
BAI:1
tim so nguyen to P biet P^2+44 la so nguyen to
BAI:2
Xet cac so co 7 chu so khac nhau va cac chu so tren thuoc tap hop{1,2,3,4,5,6,7}
a/trong cac so nhan duoc co so nao bang tong 2 so con lai hay khong?
b/co ton tai 2 so ma so nay la uoc cua so kia hay khong?Tai sao?